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Electric hoist issued an abnormal sound

Number of visitors:803 Release time：2017-6-6

This article guides:
Electric hoist when used more convenient to save the manpower and material resources, the operation will inevitably be some failure, such as the issue of some "hum" and "buzzing" and other sound, how to deal with some of the failure, lifting equipment, installation and maintenance experience, Specifically for the maintenance of such failures the following analysis:

Article core:
First, the electric hoist when the operation of the abnormal sound
Electric hoist many failures, such as control of electrical appliances, motors or reducer, etc. are often accompanied by abnormal noise, the location of these noise and the height and tone with the different reasons for the difference, maintenance, to listen to more, You can use or according to the characteristics of the fault sound to determine the location of the sound, find and repair the fault.
1, abnormal noise occurs in the control loop, issued a "hum" noise, the contactor is generally a fault (such as contactor contact failure, voltage level does not match, the core card, etc.), to deal with fault contactor Maintenance, can not be repaired must be replaced, after processing, the noise to eliminate.
2, the motor will be abnormal noise, should immediately stop, check the motor is single-phase operation, or bearing damage, the coupling axis is not correct and "sweep chamber" and other failures, which will make the motor abnormal sound, High and low tone and different sound, single-phase operation, the entire motor issued a regular suddenly strong and weak "buzzing" sound; and bearing damage, will be near the bearing, issued with "slightly deng - slightly deng" "buzz" sound ; And the coupling axis is not correct, or the motor slightly swept the chamber, the entire motor issued a very high "buzzing" sound, and sometimes accompanied by sharp harsh sound. In short, should be based on the noise of different, find fault, one by one overhaul to restore the normal performance of the motor, when the motor failure is not handled, the use of gourd is prohibited.
3, abnormal noise emitted from the reducer, reducer failure (such as gear box or bearing lack of lubricants, gear wear or damage, bearing damage, etc.), then should stop checking, first determine the reducer gear box or bearing Whether the use of lubricants before use, the use of regular replacement of lubricating oil, if not lubricated as required, the reducer will not only produce too high "buzzing" sound, but also excessive wear or damage gears and bearings.
Second, the brake down when the sliding distance exceeds the specified requirements
When the electric hoist is applied for a long period of time, the brake ring wear is too large, the brake spring pressure is reduced and the braking force is reduced. The solution is to adjust the brake bolt or replace the brake ring.
Third, press the start switch after the electric hoist does not work
Mainly because the electric hoist is not connected to the rated working voltage, and can not work, the general situation is divided into non-power, lack of phase (gourd main, control circuit electrical damage, line disconnection or poor contact, Normal work, there is such a situation, need to repair the main, control loop, overhaul, in order to prevent the main, control loop to the three-phase motor power phase loss and burn the motor, or hoist motor suddenly power operation, The hoist motor from the power line disconnected, only to the main, control circuit power, and then start the start and stop the switch, check the analysis of control electrical and line work, the problem of electrical or line repair or replacement, when (Or the voltage is too low (hoist motor voltage than the rated voltage of 10% or more, the motor starting torque is too small, so that hoist lifting the goods, and can not work, Check the motor input voltage with a multimeter or voltmeter)
In the use of electric hoist is sure to be strictly in accordance with the provisions to operate, can not ignore some minor problems and found abnormal sound when you should immediately stop to find the reasons, troubleshooting can extend the life of electric hoist.